I dedicate this book to my son, Dimitri, for his irrepressible curiosity about all things great and small, even calculus.

SJS

I dedicate this book to Ben Becker, my son-in-law. Without him, this book would not exist.

KS

I dedicate this book to my grandchildren Talia, Kaela, Ariana, and Benjamin in the hope that at least one of them will one day use it.

WMG